UrbanPro

Take BTech Tuition from the Best Tutors

  • Affordable fees
  • 1-1 or Group class
  • Flexible Timings
  • Verified Tutors

Search in

What happen if unbalanced voltage was applied to the stator of the induction motor?

Asked by Last Modified  

7 Answers

Follow 0
Answer

Please enter your answer

Maths, Science And Engineering Subjects

The effect of unbalanced voltages on polyphase induction motors is equivalent to the introduction of a "negative sequence voltage" having a rotation opposite to that occurring with balanced voltages. This negative sequence voltage produces in the air gap a flux rotating against the rotation of the rotor,...
read more
The effect of unbalanced voltages on polyphase induction motors is equivalent to the introduction of a "negative sequence voltage" having a rotation opposite to that occurring with balanced voltages. This negative sequence voltage produces in the air gap a flux rotating against the rotation of the rotor, tending to produce high currents. A small negative sequence voltage may produce in the windings currents considerably in excess of those present under balanced voltage conditions. The effect of unbalanced voltages on polyphase induction motors is equivalent to the introduction of a "negative sequence voltage" having a rotation opposite to that occurring with balanced voltages. This negative sequence voltage produces in the air gap a flux rotating against the rotation of the rotor, tending to produce high currents. A small negative sequence voltage may produce in the windings currents considerably in excess of those present under balanced voltage conditions. Temperature rise and load carrying capacity A relatively small unbalance in voltage will cause a considerable increase in temperature rise. In the phase with the highest current, the percentage increase in temperature rise will be approximately two times the square of the percentage voltage unbalance. The increase in losses and consequently, the increase in average heating of the whole winding will be slightly lower than the winding with the highest current. read less
Comments

I HAVE QUALIFIED THE GATE WITH 98 PERCENTILE WHICH IS MOST COMPETATIVE EXAMS IN ENGINEERING

Did u mean if the harmonics are there then it will produce the vibrations and noise.
Comments

Armature will not rotate
Comments

expert in B.TECH EEE subjects

Unbalanced flux will develop in the air-gap and the rotor undergoes vibrations.
Comments

tution teacher

Then the flux distribution is not same.
Comments

Engineering specialist

unbalanced voltage leads to negative sequence voltage and in turn negative sequence current which leads to a flux opposite to the normal one and in turn an emf in the rotor and this leads to negative sequence current which is very high and enough to burn rotor windings.
Comments

current will draw more in the circuit in which voltage is less and finally motor will get over heated and burnt or fuse will get blown off
Comments

View 5 more Answers

Related Questions

Why D.C drives are preferred in various industries even if the supply was A.C?
Mainly bcoz of its simlicity in speed control
Saikrishna
0 0
7
How do I score 90 marks in Maths for CBSE in class 10?
You can also score a 100 out of 100 in maths. The only key to success in maths is practice. Solve maximum number of problem and do not skip steps.
Saritha
Engineering projects are done here with more advantages contact for more details.
Cost of B.tech project. How about M.Tech projects?
Pallavi M.
What should I do after a BTech in CSE?
Not in thinking of higher education only but improving own skills & quality education
Uma
0 0
6

Now ask question in any of the 1000+ Categories, and get Answers from Tutors and Trainers on UrbanPro.com

Ask a Question

Related Lessons

Comprehensive Guide to the Management Process
Understanding the Management Process Introduction Management is the art and science of getting things done effectively and efficiently. It involves a systematic process to achieve goals using available...

Arnab Bhattacharjee

0 0
0

A Tutorial On Dynamic Programming
What is Dynamic Programming? Dynamic Programming, DP in short, is an intelligent way of solving a special type of complex problems which otherwise would hardly be solved in realistic time frame. What...

Limit, Fit, Tolerance

Arnab Bhattacharjee

0 0
0

Capacitor Construction
• A capacitor is constructed using a pair of parallel conducting plates separated by an insulating material (dielectric). • When the two plates of a capacitor are connected to a voltage source...

Protocol: Preparation for Ultra competent cells of E.Coli DH5-alpha
Preparation: Prepare LB media and Transformation Buffer. Transformation Buffer 10 mM Hepes15 mM CaCl2250 mM KCl (pH to 6.7 with KOH)MIX Thoroughly with constant stirring and than add 55 mM MnCl2 and...

Recommended Articles

According to a recent survey conducted by the NCAER (National Council of Advanced Economic Research), engineering is the most sought after course in India. Some engineering courses are offered as BE or Bachelor of Engineering while some as Bachelor in Technology or B.Tech. Since engineering is a professional course, the...

Read full article >

MBA, Medicine and engineering are the three main professional courses in India. Engineering is still one of the highly sorted after professional courses in the under graduate level, while MBA is favoured as a preferred post graduate course. To shine in these courses, one needs to work and study hard. Engineering as a...

Read full article >

While schools provide formal education to the children, the home is where they start learning about things informally. Parents think that schools will take the initiative to educate their children. Well, this is partially true, as parents also play an essential role in bringing up their child. For the development of particular...

Read full article >

With the mushrooming of international and private schools, it may seem that the education system of India is healthy. In reality, only 29% of children are sent to the private schools, while the remaining head for government or state funded education. So, to check the reality of Indian education system it is better to look...

Read full article >

Looking for BTech Tuition ?

Learn from the Best Tutors on UrbanPro

Are you a Tutor or Training Institute?

Join UrbanPro Today to find students near you
X

Looking for BTech Tuition Classes?

The best tutors for BTech Tuition Classes are on UrbanPro

  • Select the best Tutor
  • Book & Attend a Free Demo
  • Pay and start Learning

Take BTech Tuition with the Best Tutors

The best Tutors for BTech Tuition Classes are on UrbanPro

This website uses cookies

We use cookies to improve user experience. Choose what cookies you allow us to use. You can read more about our Cookie Policy in our Privacy Policy

Accept All
Decline All

UrbanPro.com is India's largest network of most trusted tutors and institutes. Over 55 lakh students rely on UrbanPro.com, to fulfill their learning requirements across 1,000+ categories. Using UrbanPro.com, parents, and students can compare multiple Tutors and Institutes and choose the one that best suits their requirements. More than 7.5 lakh verified Tutors and Institutes are helping millions of students every day and growing their tutoring business on UrbanPro.com. Whether you are looking for a tutor to learn mathematics, a German language trainer to brush up your German language skills or an institute to upgrade your IT skills, we have got the best selection of Tutors and Training Institutes for you. Read more